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color blindness
color blindness visual defect resulting in the inability to distinguish colors. About 8% of men and 0.5% of women experience some difficulty in color perception. Color blindness is usually an inherited sex-linked characteristic, transmitted through, but recessive in, females. Acquired color blindne...
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color
color effect produced on the eye and its associated nerves by light waves of different wavelength or frequency. Light transmitted from an object to the eye stimulates the different color cones of the retina, thus making possible perception of various colors in the object.
See also light ; pa...
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vision
vision physiological sense of sight by which the form, color, size, movements, and distance of objects are perceived.
Vision in Humans
The human eye functions somewhat like a camera; that is, it receives and focuses light upon a photosensitive receiver, the retina. The light rays are be...
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holography
holography , method of reproducing a three-dimensional image of an object by means of light wave patterns recorded on a photographic plate or film. Holography is sometimes called lensless photography because no lenses are used to form the image. The plate or film with the recorded wave patterns is c...
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hue
hue The perceived main wavelength of light defining a color. White, gray, and black may be considered as colors but not hues....
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television
television transmission and reception of still or moving images by means of electrical signals, especially by means of electromagnetic radiation using the techniques of radio and by fiberoptic and coaxial cables. Television has become a major industry, especially in the industrialized nations, ...
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litmus
litmus organic dye usually used in the laboratory as an indicator of acidity or alkalinity (see acids and bases ). Naturally pink in color, it turns blue in alkali solutions and red in acids. Commonly, paper is treated with the coloring matter to form so-called litmus paper. Litmus is extracted, c...
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interference
interference in physics, the effect produced by the combination or superposition of two systems of Waves , in which these waves reinforce, neutralize, or in other ways interfere with each other. Interference is observed in both sound waves and electromagnetic waves, especially those of visible lig...
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printing
printing means of producing reproductions of written material or images in multiple copies. There are four traditional types of printing: relief printing (with which this article is mainly concerned), intaglio, lithography, and screen process printing. Relief printing encompasses type, stereotype, ...
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modern art
modern art art created from the 19th cent. to the mid-20th cent. by artists who veered away from the traditional concepts and techniques of painting, sculpture, and other fine arts that had been practiced since the Renaissance (see Renaissance art and architecture ). Nearly every phase of modern a...
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